Pneumatic Lift Caster

[chawalang]

http://www.rosebrand.com/product3896/Pneumatic-Lift-Triple-Swivel-Caster.aspx

Can anyone recommend a less expensive version of this? I only need each cater to be able to lift 200lbs. The main things is to have the effect of retractable wheels.

 

[sk8rsdad]

AirPux

 

[rsmentele]

Make your own?

http://www.frightprops.com/pneumati...sories/air-bags/air-bags-2-5-inch-stroke.html